Question

What is the 20th term of the arithmetic sequence 4, –2, –8, … ?

Answer 1

ummm.?

Answer 2

Answer
–122
–128
–110
–116
those are my choices with ur number im not getting any of them

Answer 3

4 - (20 - 1) * 6 = -110 .

Answer 4

That is correct

Answer 5

-110

Answer 6

can someone explain how its done?

Answer 7

Yeah, tnsgod, what's the general formula?

Answer 8

Okay, I think I got it: Start with the first term, subtract (number for terms minus 1) multiply it by the distance between the terms

Answer 9

Well, 4 is the first term and each subsequent term is 6 less than the one before. Therefore:

ith Term = 4 - (i - 1) * 6

Answer 10

if you subtract 6 from 4 20 times.. you'll have -110.
4-6 = -2
-2-6 = -8
-8-6 = -14
etc.